code: def test_call(self):
      ema = moving_averages.ExponentialMovingAverage(0.5)
      self.assertAlmostEqual(ema(3.0), 3.0)
      self.assertAlmostEqual(ema(6.0), 5.0)
  
imports: from absl.testing import absltest
  from absl.testing import parameterized
  from haiku._src import basic
  from haiku._src import moving_averages
  from haiku._src import multi_transform
  from haiku._src import test_utils
  from haiku._src import transform
  import jax
  import jax.numpy
  import jax.random
  import numpy
  import tree
label_desc: Use image node_id 5 for calling the MovingAveragesTest obj's underlying member method code with example usage: obj.test_call() without return types